Electrical drop-bar for doorways



(No Model.)

B LYONS ELECTRICAL DROP BAR FOR DOORWAYS.

Patented Oct. 13,1891.

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,BGHJ'QMCTL Lyons. 72

UNITED STATES P TENT OFFICE.

BENJAMIN LYONS, OF KANSAS CITY, MISSOURI.

ELECTRICAL DROP-BAR FOR DOORWAY S.

SPECIFICATION forming part of Letters Patent No. 461,355, dated 0ctober l3, 1891.

Application filed February 18, 1891. Serial No. 381.829. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMINLYoNs, acitizen of the United States, residing at Kansas City, in the county of Jackson, State of Missouri, have invented certain new and useful Improvements in Electrical Drop -Bars for Doorways, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improved electric drop-bars for doorways; and it consists in the novel construction and arrangement hereinafter fully set forth and described.

The objects of myinvention are, first, to provide a means whereby the exit or entrance of a store or other business place may be cut 0E instantly by means of a series of metallic bars falling across the same (when desired) by operating abutton or its equivalent, thereby energizing a magnet, which will release said bars from a supporting-key; second, to attain these ends with simplicity and economy, which I do by constructing and operating the device illustrated in the accompanying drawings, in which FigureI is a perspective view of my device, showing it incased in a boxing or jamb made to receive it. Fig. II is a side elevation of said device, illustrating the magnets, &c., by

which it is operated. Fig. III is a detail in resents a standard or post rigidly secured to A and are provided with collars c, which I hold them in place. Enci-rcling these shafts are coil-springs D, which are seated in recesses X, made in thestandard A.. One end of said springs bears against the head of said bolts, while the opposite end bears against bottom of the recess a, thereby forcing said bolts outward, so that when the bars B are released and are falling to a horizontal position the bolts are forced backward, and when said bars have fallen to a level said bolts are thrown out by springs D, thereby locking the bars down. The pins 0 act as a check to the fall of the bars, which, as is readily seen, are securely locked between said bolts 0 and pins 0. a

E represents a key pivotally secured to the standard A by means of a pin f, which passes through the support F, said support being rigidly fastened to the standard A by suitable screws orbolts passing through perforations f.

e is the end of key, which when in its normal position rests against the friction-roller g, which is secured on lever G by means of pin or shaft 9.

g" is a plate over which the end of the key G travels when thrown out of position.

f" is a stop-pin rigidly secured on lever G, and is for the purpose of preventing the key E from passing off from said lever.

H represents the armature, which is secured to lever G. This being attracted by the magnet I releases the key E, which supports the bars B. The lever G is pivoted near its center by apin and bearing G, as seen in Fig. II. This lever is operated by the magnets I, which are energized by batteries J.

here narrow or single doors are used the device as illustrated in Fig. Iissufficient; but in wide or double doors or such other places as it may be found desirable and convenient they may be used doubly, one on each side, the operation being the same.

This invention is designed to be used in banks, jewelry stores, jails, and all otherplaces where they may be conveniently applied, and are for the purpose of closing the entrance or exit to any building or place instantly, thereby cutting off the channel of escape from any one on the inside should they attempt to get away with stolen goods.

The operations of my device are very simple and are as follows: The device illustrated in energize the magnet, thereby attracting the armature H, throwing lever G and frictionroller g, thus releasingthe key E, thereby allowing the bars B to drop of their own specific gravity, as heretofore described.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is v 1. An electric drop-door constructed of a series of barbed bars which are operated by electrical devices an (1 locked automatically by bolts and pins, substantially as set forth and described.

2. In an electric drop-door, the combination of a series of barbed bars pivoted to the standard A, a series of locking bolts and pins, together with keys and levers, and a magnet for operating the same, as fully set forth and described.

3. In an electric drop-door, the combination of a series of barbed bars, a series of locking bolts and pins, together with keys and levers, and a magnet for operating the same, as fully set forth and described.

' In testimony whereof I affix my signature in presence of two witnesses.

BEN. LYONS.

Witnesses:

JAMES K. LATHY, I A. P. FONDA. 

